Water-cooled buck-stay.



e. L. nmwonm, la. WATER COOLED BUCK STAY.

- APPLICATION FILED JAN. 15. i916, 1,27,543. Patented July 9,1918.

W R v M GORGE L. DANFOBTH, JB., OF'CHICAGO, ILLINOIS.

WAT R-000ml) BUCK-STAY.

To all whom it may concern Be it known that I, GEORGE L. DANFORTH, Junior, a citizen of'the United States, and resident of Chicago, county of Cook, State of Illinois, have invented certain new and useful-Improvements in VVater-Cooled Buck'- Stays, of which the cation.

My invention refers to the manufacture of steel and has particular reference to a novel buckstay for use in connection with open hearth furnaces and the like.

To those familiar with the art it is known that with such furnaces having buckstays of iron or steel'not being water cooled it is very difficult to prevent the wearing away of the furnace walls, which permits the heat within the furnace to burn away and thus destroy the metal buckstays. It is also known that buckstays being made of cast steel or iron having cast integrally an interior space for the cooling water frequently crack, leak and necessitate the removal of the water, after which the buckstay is rapidly destroyed by the furnace heat. There are, also, buckstays in use made of steel plates, either welded or riveted together, having within a space for cooling water. Such buckstays to be made reasonably economically are made of comparatively light plates and frequently are damaged by being struck by the charging car and leak, there by necessitating discontinuance of the supply of the cooling water, after which the buckstay on account of its characteristic construction is rapidly destroyed by the heat from within the furnace.

To provide a buckstay of reasonable cost and of greater durability than those before described I manufacture mine of a rolled steel slab, preferably of a length sufficient to extend from below the furnace hearth to above the furnace roof. This slab, usually rectangular in a horizontal section, is then drilled or bored out, forming in its interior nearest the heated atmosphere 2. space for the cooling water, leaving the remaining portion, or approximately half of the slab, to provide the bolt holes that are necessary for attaching the door frames, fore-plate castings, Spreaders, etc., that are combined with the buckstays to properly support and bind the hearth and refractory walls of the furnace.

It can be noted from the accompanying drawing that in this way there is provided Specification of Letters Patent.

following is a specifi- Patented July e, 1918.

Application filed January 15, 1916. Serial No. 72,217.

a buckstay of great strength and durability,

and sufiicient to withstand the rough usage usually encountered in such service, and that the water cooling space provided is seamless and, therefore, will not develop cracks and leaks; also that the steel walls surrounding the cooling water are of such thickness that should the water supply for any reason temporarily, fail the buckstays can operate for several days Without warping or impairing their ability to contain without leakage the cooling water when again supplied.

Furthermore, insome districts the,water which must be used for cooling contains more or less free acid which acts upon water-cooled stays and if of thin section or of riveted construction causes the rapid deterioration thereof.

The. construction and operation of the buckstays will be more readily understood by reference to the drawings wherein:

Figure l-is an elevation of part of an open hearth furnace showing a buckstay embodying my invention in connection with the necessary casting, etc.

Fig. 2 is a vertical section of the buckstav.

Fig. 3 is a transverse section on the line 33 of Fig. 2.

In the drawings the numeral 5 designates an open hearth furnace of the usual construction. Extending along the front of the furnace 5 is a series of vertical stays 10 secured to the girder 7 along the tops thereof. 8 represents the door frames which are joined to the stays 10. Spreaders 9 are also fastened to the stays 10. A buckstay embodying my invention is shown at 10 and is' secured to the beam 7 and other parts in the usual manner.

Referring to Figs. 2 and 3 it will be seen that the buckstay embodying my invention is formed of a slab of metal, either rolled or forged. A longitudinally extending hole or aperture 11 is drilled or bored therethrough. It is preferable to drill the hole 11 nearer the edge of the stay which will be against the furnace wall. This accomplishes two purposesbrings the cooling chamber nearer the heat, thus preventing heating of the stay 10, and furnishes sufficient space for the bolt holes 13 and 14 for attachment thereto of other parts of the framework. As shown in the drawings, the lower end of the aperture 11 is closed by a plug 15." lf'desirable" the a erture need not be drilled or bored the fu llength of the slab, thus eliminating they need of the plug 15. For supplying water to aperture 111 pro- ;vide a feed pipe 16 entering at or near the top 'andextending downwardly in the aper- .ture 11 but terminating short of the bottom;

- To prevent play of the pipe 16,- the end may be. slotted and spreadas indicated by' '17 so thatthe spread ends may bear against the sidesofthe aperture 11; Near the top of;

thestayYI provide an outlet 18 through which the'wa ter may overflow. i I prefer toplan the outlet 18 so that it will be above Having thus described the construction.

and advantages o-fmy invention, what I claim is: i

1. A buckstay formed of'a rolled metal slab having a drilled aperture therethrough and water connections to said aperture, substantially as described.

2. A buckstay formed of a rolled metal slab having a bored aperture therethrough,

in engagement with I the waterconnections to said aperture compris ing a pipe extending downwardly within said aperture and terminating short of the a bottom thereof, substantially as described.

- 3. A buckstay' formed of a wrought metal slab, having a drilled aperture extending substantially the length thereoflwater connections to said aperture comprising a feed pipe directed downwardly in said aperture,

and an' outlet connection near the top of said buckstay', substantially as described.

- 4. A buckstay formed of a wrought metal slab having an aperture formed after said I slab is formed, Water connections to said aperture comprising a feed pipe extending substantially through said aperture, said pipe being enlargedat its discharge end and adapted to abut the sides of said aperture, and an outlet connected to said aperture near the upper end thereof, substantially as described. i

5. A'device of the class described formed of wrought metal, and provided with a,

longitudinally ,-extending aperture, water connections to said aperture, said connections comprising a feed pipe led into saidf aperture from the top and smaller in diameter than said aperture, and an outlet connected to said aperture above the discharge end of said feed pipe, substantially as described.

GEORGE L. DANFORIH, JUNIOR.

Witnesses Mon'roN B. CARLTON, JAS. L. SMITH. 

